Drying apparatus



April 16, 1929. E. c. READER ET AL 1,709,154

DRYING APPARATUS Filed may i, 1926 3 Sheets-Sheet l INVENTORS y 4 4 {4M4 4 N ill-ya.

Apfill6,1929. E.C.READER ETAL DRYING APPARATUS Filed May 1926 5Sheets-Sheet E. C. READER ET AL DRYING APPARATUS April 16, 1929.

Filed May 1, 1926 5 Sheets-Sheet 3 INVENTORJ Wile/0 Patented Apr, 16,1929.

ireo srarss EDWARD onnsnnn AND VINCENT P. FINN, or cnnvnnnnn, onro.

DRYING- APPARATUS.

Application filed May- 1826. Serial No. 105,9?1.

This invention relates to drying apparatus,-and more particularly toapparatus for drying materials, in a iine'ly divided cond tion. Thegenera object ot the invention is to provide an apparatus of thischaracter which will enable material to be dried eiliciently and.without danger of adhering to walls of the drying conduit through whichit is conducted to the place of storage. 7 ii Another object of theinvention is pro- Vide a drying apparatus oi. the character dcsribedwhich is well adapted for drying finely divided food stuffs such as andall kinds of condiments.

Another object of our invention is to provide an apparatus for dryingfinely divided edible material in which the material is dri d withoutcoming in contact with the products 0.1? comb stion.

fil Another object of our invention is to provide a novel heating unitwhich is very ellicient, yet simple in con tructiou and which can bemanufactured at a. comparatively low cost. I

Furtherand more limited objects of the invention will appear hereinafterand will be realized in and through the construction and arrangement ofparts shown in the accompanying drawings in Which Fig. l is a view in 30side elevation of my improved drying apparatus; Fig; 2 is a horizontalsectional view on the l1ne22 Oi F1 1 1' Fi 3 is vertical n b 7 y a n 1sectional vlew of the heating unit or turnace; and Fi l 1s a vlewsimilar to F10. 3 but taken I b A a V at right angles thereto.

Describm the various arts b reference S? characters tne numeral 1deslgnates our 1mproved heating unitto which a combustible mixture issupplied by means of a plurality of gas or oil burners 2. The burners inthe illustration shown herein are of the injector burner type havingsupply pipes 3 for oil and pipes t for delivering airunder pressurethereto. The details of the burner construction form no part of ourinvention, it being sufficient for our purpose to use any one of theexisting. types of injector burners employing oil or as and air underpressure.

5 denotes a blower supported on a suitable stand 6 and having a deliverypipe 7connected with a hot air chamber 8 and a conduit 9 communicatingwith the upper end of the heating unit.

The heating unit comprises a base B having a combustion chamber 10, aheating chamber described hechzunhcr 10 will 11 and a fresh air supplychamber 12. A removable steel plate 10 separates the combus tion chamberfrom the heating chamber and a plurality of conduits or passageways llconnect the combustion chamber 10 with the heating chamber ll. Apartition 12 separates the heating chamber from the fresh air chamber12. The hot air chamber 8 is supported within the heating chamber 11 bymeans of suitable supports 13 and this chain-- bcr communicates with thefresh air chamber through passageways 1 A conduit or fume vent 15communicates with the chamber 11. The fresh air chamber 12 is alsoprovided with suitable vent openings 16. Communicating with the hot airchamber 8 is a conduit 17 whirl of greater cros. sectional area than thepurpos'ze of which will herer. The conduit 1? communi- 'I opposite 031l\ch a receptacle l8 l and connects the hot air e receptacle 18. Thematedeli vcred into the con duit I? 19 as shown in Fig. 1. The ionedadajcent one side of ruler and the conduits ll flC'tS oi? combustion to"he il in which the hot air chain- The conduit 15 conducts is ofcombustion to the outside air. 1 the parts constructed and ar god as beh 2, he air for the burnr n in trom the corihiii. '4'

' by the controlled by s: itable alres l. The blower is driven from anysuitable source of power, and the air will opcrate to atoinize the oilor other liqu' i fuel in the manner usual with injei' tor burners andthe mixture will be burned within the combustion chamber 10 the productsof coinhustion being delivered by means of the conduits 11 to thechamber 11, the blower 5 being connected with the upper end of thefurnace by means the condu 9 and the furnace beprovided with vent openin16 as shown will be drawn from the upper part of the furnace anddelivered throu h conduit "4" into chamber 8. The conduit 17 beingconsiderably larger than the conduit 7 and the conduit 7 beingpositioned as shown in Fig. 3 an injector action is obtained and the hotair from the chamber 8 is delivered into the conduit 17. The material tobe dried is fed into the conduit 17 from the hopper 19 and this a drivenby a motor 22 and delivered conduit is preferably lined with laminatedwood or a metal known as Alpae: metal which prevents the food stuffsfrom becoming contaminated due to the contact with the interior of theconduit 17. The material to be dried being delivered into this stream ofair and entrained by the action thereof will be thoroughly dried by thehot air and will be delivered by the blast into the container 18. The

particles of the materials to be dried will be separated and thoroughlydried without adhering to the-walls of the conduit.

If desired the container 18 may have connected therewith, by mea of aconduit 20, a standard dust collecting appara us. The dust beingwithdrmvn by means of a s 1011 fan i l to a dust collecting recepti e 23from which the same may be withdrawn through a spout As shown in detailin Fig. 2 the container 18 is provided with. a suit ble hub 28 whichprevents the same from becoin g worn due to the particles being thrownagainst the mterior wall of the container.

The apparatus shown herein has proven very successful and ciiiciwt inacti n and prevents the caking of the material to be dried and itsadherence to the walls of the conduits and, also effects av complete andrapid drying of the material. I

An in'iportant feature of our apparatus is that the material to be driednever comes in contact with the products of combustion from the furnaceas the same would have an injurious effect upon the food stuffs to bedried.-

it will now be cl .ar'that we have provided an apparatus which willaccomplish the objects of the invention as hcreinbefore started,

Having thus described our invention, what i we claim is z 7 1. A heatingunit tor drying apparatus comprisin a fresh air chamber, combustionchan'iber and means for heating the same,

a heating chamber having communication with said combustion chamber, ahot air chamber supported within said heating chamber, a fume vent forsaid heating chamber, a pair of oppositely disposed conduits con1-municating with said hot air chamber and. leading through opposite wallsof said heating chamber, and means for withdrawing air from said freshair chamber and delivering the same through said pair of conduits.

2. A device set forth in claim 1 having a removable partition betweensaid combustion chamber and heating chamber.

3. A device as set forth in claim 1 having a conduitconnecting saidfresh air chamber and hot air chamber.

4. A device as set forth in claim 1 in which one of said pair ofconduits is of larger cross sectional area than theother.

5. A device as set forth in claim 1 in which said means for withdrawingair comprises a blower cmnmunicating at one end with said fresh airchamber and the opposite end with one of said pair of conduits.

6. In a heating-unit for drying apparatus of the character described,the combination of a combustion chamber and means for heating the same,a eating chamber having communication with said combustion chamber andvented to the atmosphere, a hot air chamber arranged within said heatingchamber, a pair of conduits communicating with said hot air chamber andleading outwardly therefrom, and means for delivering air through saidheating chamber and conduits.

7. A device asset forth in claim 6 having a removable partition betweensaid combustion ch amber and hes ting chamber.

8. A device as set forth in claim 6 in'which one of said pair ofconduits is of larger cross sectional area than the other.

9. in a. heating unit of the character c scribed, the combination of acombustion chan'iber and means for heating the same, of a heatingchamber communicating with said combustion chamber and vented to theatmosphere, hot air chamber disposed within said heating chamber, anoutlet conduit leading from said hot air chamber and an inlet conduitleading into said hot air chamber and havin its delivery end disposed inalignment with the intake end of said outlet conduit and means fordelivering a blast ofair through said conduits. v i

10. A heating unit as set forth in claim 9 in which said outlet conduitis of larger diameter than the delivery end of said inlet conduit.

1.1. A heating unit as se forth in claim 9 having a removable partitionbetween sail EDWARD e. READER viucnur r. rum.

